BASICS OF REMOTE SENSING AND GIS PDF

Now-a-days the field of Remote Sensing and GIS has become exciting and glamorous with .. The basic assumption is that each individual has. A geographic information system (GIS) is a computer-based tool for mapping and analyzing feature events on earth. GIS technology integrates. A GIS receives much of the data for its built-in layers from Remote Sensing platforms such as satellites, radars and airplanes. And as remote sensing technology continues to increase in resolution and power, the data base will enlarge and increase the potential power of users of a Geographic Information System.


BASICS OF REMOTE SENSING AND GIS PDF

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BASICS OF REMOTE SENSING AND GIS PDF

  • Basics of Remote Sensing and GIS - S. Kumar - Google книги

One advantage is that the atmospheric disturbances are absent in this type of sensing. The sensor may place on a ladder, scaffolding or crane etc.

Know Basics of Remote Sensing Quickly and Become Expert

Aircrafts are the major platforms in Aircraft based sensors. Helicopters are also occasionally using.

Aircrafts are using to collect the detailed information about the Earth surface at any time. Major disadvantage is that it is not possible to fly aircrafts at bad weather. In the space remote sensing are conducted from either using Space shuttle or Satellites.

Know Basics of Remote Sensing Quickly and Become Expert

These kinds of Satellites are often known as Remote Sensing satellites. Satellite based sensors are the most efficient and wide spread in the world. These can give a global level coverage basics of remote sensing and gis it is costly. Cost is often an important factor while choosing the sensor.

These satellites have some characteristics that makes this is a unique platform in Remote Sensing sensors. Orbits The path which is followed by satellites is referred as Orbit.

Orbits vary along with their altitude and their orientation and rotation related to the Earth.

What are GIS and remote sensing?

To monitor a particular place regularly in the earth surface we are using geostationary orbits. The satellites following the same orbit are called geostationary satellites.

This orbit has a very high altitude of KM basics of remote sensing and gis. The satellites revolving through the orbit have a speed match with the rotation of Earth. This allows monitoring a particular place continuously.

These satellites cover the local time regularlyreferred as Sun synchronous satellites.

BASICS OF REMOTE SENSING AND GIS PDF

This enables the consistent illumination conditions when acquiring images of specific season over successive years. Resolution Properties Some instruments taking images from very high altitude and it may give a global coverage or country level coverage.

BASICS OF REMOTE SENSING AND GIS PDF

It is not possible to extract information about your home from the global level coverage. In order to extract information we have to design a new sensor to provide Centimeter level information.

While designing the sensor or using the output image we basics of remote sensing and gis to look up about resolution. There are four distinct types of resolutions are there they are Spatial Resolution The ability of the sensor to detect the smallest single object in the Earth surface is referred as Spatial Resolution.

Extraction of details from the image is highly depends upon the spatial resolution.

ARCHIVED: What are GIS and remote sensing?

IFOV is the angular cone of visibility of the sensor. The size of the area basics of remote sensing and gis is determined by multiplying IFOV by the distance from the ground to the sensor.

Spectral Resolution Simply we can define as the ability of the sensor to record the information on a particular spectral range is called Spectral Resolution or the ability of the sensor to define fine wavelengths.



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